On the basis of locomotary organ Trypanosoma is included under flagellated protozoans. It resembles Protista on the basis of following characters
(i) Possess unicellularity
(ii) Possess asexual reproduction, i.e., by binary fission
(iii) Possess centrally located nucleus and also contain an prominent nucleus endosome
(iv) Reserve food material is in the form of granules, such characters possessed by Trypanosoma made it to be included under kingdom-Protista.